Plate-pattern for molding grooved pulleys.



N0. 65-l,|74. Patented June 5, I900. D. WOLF. PLATE PATTERN FUR MOLDING GBOUVED PULLEYS.

(Application filed Oct. 10, 1899.) (No Model.) 4 Sheets-Sheei I.

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Tu: uonms PETERS 00., PHOTCLLITHQ. WASHWUTON, D. c,

No. 65l,l74. Patented June 5, I900. D. WOLF.

PLATE PATTERN FOR MOLDING GRQO VED PULLEYS.

(Application filed on. 10, 1:299. (No Model.) 4 Sheets$heet 2.

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v Patehted June 5, I900. n. WOLF. PLATE PATTERN FOB MOLDING GBOOVED PULLEYS.

(Application flied Oct. 10, 1899.)

4 Sheets-Sheet 3 Patented lune 5, 3900.

(Application filed Oct. 1O 1899.) (No Model.)

4 Sheets-$heet 4.

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PEN

DANIEL WOLF, or ALLEGHENY, PEnNsYLvANIA;

SPECIFICATION forming a of Letters Patent No. 651,174, dated June 5, 1900.

Application filed ctol er10,1899. Serial No. 733,158. (Nomodehl 1 0 all iuhmntrl may concern:

Be it known that I, DANIEL WOLF, a citizen of the United States of America, residing at No. 1239 Washington avenue, Allegheny,

in the county of Allegheny and State of Penn-.

is a specification, reference being had therein,

to the accompanying drawings.

This invention relates to certain new and useful improvements in molds for making grooved pulleys, and has for one object to con-- struct a mold in which the pulley may be cast entirely in one piece and which will considerably facilitate the making of such pulleys and insure the casting of. a pulley which will be perfectly true throughout.

In the casting of grooved pulleys with .the aid of a pattern of the same shape as one-half of the pulley and which is used to form the impression in the mold it hasbeen found difficult to obtain a perfectly-true pulley by reason of the jarring or ramming which it is necessary to give the sand in the flask of the mold, causing particles of this sand to work between the pattern and the plate of the flask upon which it rests, thus slightly inclining the pattern and causing the pulley when cast to be of unequal thickness and imperfect, so as to cause its rejection for use in many instances. I aim to overcome these objections by the aid of my invention and to construct a grooved pulley without the aid of patterns other than those which are integral with and form a part of the flask employed by me.

It is a further object of my invention to construct a mold of this character that may be employed in connection with a machine for jarring the sand Within the mold or flask or that may be used in the ordinary manner upon a bench or table without the machine for jarring the sand.

Briefly described, my invention consists of a main or base plate, a counter-plate, a cope, and a drag, these four elements constituting the mold within which the sand mold is formed.

cast will be hereinafter more specificallydescribed and then particularly pointed out in the appended claims, and in describing the invention in detail reference will be had to the accompanying drawings, forming a part of this specification and wherein like numerals of reference will be used to indicate corresponding parts throughout the several views of thedrawings.

In the drawings I have shown in Figures 1 to 13, inclusive, the successive steps as required for the completing of the sand mold. Fig. Us a vertical longitudinal sectional view of the bed or base plate, with sand therein, indicating the first step toward formingthe completed sand mold. Fig. 2 is a like view of the main or base plate with the counterplate in position thereon, indicating the second step toward forming the completed sand mold. Fig. 3 is a like view of the main or base plate and counter-plate, showing the same inverted, indicating the third step necessary toward forming the completed sand mold. Fig. 4 is a like view of the main or base plate and the counter-plate as shown in Fig. 3, with the cope placed thereon, as the fourth necessary step in forming the completed sand mold. Fig. 5 is a like view of the cope filled with sand, lifted off from the main or base plate, and inverted, so as to hold the sand within the same. Fig. 6 is a vertical longitudinal sectional view of the main or base plate, the counter-plate, and the drag, the latter filled with sand. Fig. 7 is a like view of the drag lifted off the main or base plate, with cover placed thereon to hold sand. Fig. 8 is a similar View of the main or base plate with the portion of the sand mold formed in the drag thereon, showing how drag may be removed. Fig. 9 is a like view of the main or base plate with drag on top of same; and Fig. 10 is an inverted view of Fig. 9, showing one-half of the completed sand mold within the drag. Fig. 11 is a like View of the drag, showing the one-half of the completed mold with the main or base plate removed. Fig. 12 is a like view of the drag with the. cope placed upon top of same, showing the completed sand mold. Fig. 13 is a like view of the drag and cope, showing the .completed sand mold with the pulleys cast therein. Fig. 14: is a detail perspective view, on a reduced scale, of the cope forming a part of the flask. Fig. 15 is similar view of the main or base plate. Fig. 16 is a similar View of the cope, and Fig. 17 is a similar view of the drag.

As heretofore stated, the flask or mold within which the sand mold is formed consists of four elements the main or base plate 1, the counter-plate 2, the cope 3, and the drag 4+- eaeh of which is of especial construction in order to effect the results obtained with my invention. When using these parts of the flask or mold with a jarring-machine for the sand, they are each formed at the end with ears having V-shaped grooves therein, which ears act as guides for retaining the parts upon the jarring-machine.

The main or base plate 1 consists of the bed-plate 5 thereof, which has arranged on its upper face a series of integral patterns 6, the number of which is of course regulated by the size of the mold. These patterns 6 are circular in outline and are each provided with a concave peripheral groove 7 to receive the sand and form a part of the mold which forms the peripheral groove in the completed pulley. These patterns may be arranged in pairs upon the bed-plate 5, so that the molten metal may be fed into the completed sand mold through a common gate, as is shown in the accompanying illustrations and as will be more fully pointed out hereinafter. This main or base plate 1 has formed integral with its bedplate 5,0n the upper face thereof,an upwardly extending rectangular rim 8, which is preferably slightly flared outwardly, so as to produce a slight incline of the inner face thereof, in order that the sand may be rammed 0r jarred more firmly into the receptacle which is formed by this rim. At its two ends this base or main plate 1 has formed integral therewith the guide-ears 9, while the rim Sis provided directly above the V-shaped groove 10 in these guide-ears with apertures or openings 11, adapted to receive the pintles carried by the jarring-machine for the purpose ofreversi ng the flask or mold. The under side of this main or base plate is formed with the annular recesses 12 and the downwardly-extending projections 14, formed on the plate directly opposite to the dies 6, the projections 14 being of the same outline as the one-half of the hub of the finished pulley and acting as the pattern for forming the impression in the sand mold, while the annular recesses receive the sand for forming that part of the moldthatproduees the annular recesses or coring in the sides of the pulleys. The patterns 6 and the patterns 14 are each prefer ably provided with the central recesses or indentations 15 and 16, respecti vely, eausi n g the completed. sand mold to producealike recess or indentation centrally of each end of the finished pulley in order that the same may be bored perfectly true.

'lhe counter-plate 2 is of a rectangular form, similar to the plate 5 of the main or base plate 1, and has secured to its upper face, at each end thereof, the guide-plates 17, provided ecu trally of their length along the outer edge with the V-shaped grooves 10' to receive the reversing-standards carried by the jarringmachine. These end plates 17 carry downwardly-extending feet 18,which project downwardly outside the rim 8 of the main or base plate 1 when the counter-plate 2 is placed within the rim 8 of said base-plate and which act as a support for the drag when the latter is placed on top of the counter-plate during the process of forming the mold, as will be explained. This counter-plate 2 is formed with as many openings 19 as there are patterns 6 and 14 in the main or base plate, the said openings being arranged to register with these patterns. The plate has formed on its under side around each of these openings 19 annular flanges 20, which are provided with a peripheral groove 21 to receive the sand and form a part of. the sand mold for forming the completed pulley. This counter-plate 2 is provided with a central aperture 22,comm u nicatin g with the gate 23, the latter registering with each of the openings 19 to pass the molten metal into the sand mold. In order to keep this opening 22 open during the process of forming the sand mold, a pin may be placed therein, as will be readily apparent. For the purpose of reversing this counter-plate upon the jarring-machine I secure to the under side of the end plates 17 ears 24, having apertures 25, which register with the apertures 11 in the rim 8 of the main or base plate when said eounterplate is in position on said base-plate and re ceive the reversing-pintles carried by the jarring-machine.

The cope 8 consists of a rectangular open boxlike frame, the walls of which flare so as to produce a slight incline of the inner faces thereof, the opening in the one side being considerably larger than the opening in the other side, so that when the smaller opening is down the inclined sides will hold the same within the cope, and when the larger opening is down the sand is held within the cope by means of a pair of slides 26, which are guided inwardly or outwardly during theirlongitudinal movement by the headed pins or screws 27, secured in ears 28, formed with the sides of the cope adjacent to its larger opening. These headed pins or screws engage in the slots 29, arranged in the slides slightly transversely to the slides, while the edges of the cope are slightly cut away, as at 30, to allow for this movement of the slides. \Vhea forced inwardly, a part of these slides projects beyond the inner face of the cope and forms a support for the sand. This cope is formed at each end with a pair of guide-ears 31 32, having the V-shaped groove 33 to receive the reversing-standards of the jarring-machine. The drag 4 also consists of a substantially-rectangular open boxlike frame of the same length and width as the cope, but the sides of which do not need to be of as great a depth. The inner face of the side walls of this drag is also inclined, so

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that the sand will be held therein when the drag is in one position, and when inverted, so that the larger opening will be downward, the sand is retained in position in the drag by means of a board or supplemental plate 34, which is placed on the larger opening of the drag before inverting the same. This drag has formed integral with its ends the guide ears 31 32, having the V-shaped notches 33 to receive the reversing-standards of. the jarring-machine, these guide-ears being of the same construction as shown and described for the cope 3. The drag also has formed integral with its ends, near the edge adjacent to its smaller opening, a pair of lugs 35, the upper face of these lugs being on a plane with the edge of the drag and are adapted to engage upon the ends of the feet or posts 18 of the counter-plate 2.

While I have herein shown and described the main or base plate, the counter-plate, the cope, and the drag as constructed with the guiding-ears, it will of course be readily apparent that such ears may be dispensed with where it is not desired to use the mold in connection with a jarring-machine for benchwork. However, I prefer to construct the parts with these guide-ears, so that the mold may be used either with the machine or for larger work.

The operation is as follows: The main plate 1 is placed in position with the rim upwardly, as shownin Fig. 1 of the drawings. This plate is then filled with sand, and the latter struck ofi level with the top of the rim, thus dispensing with the jarring or ramming of the sand within the plate, as in the ordinary method. This sand takes the impression of the upper face of the plate 1,-and after the sand has been struck off level with the rim the counter-plate 2 is placed in position on top of the main plate 1, as shown in Fig. 2 of the drawings. After this counter-plate has been placed in its position on the plate 1 the two plates are jarred in a suitable manner and then inverted. (See Fig.3 of the drawings) When the plates are in this inverted position, I place on top of the main or base plate 1 the cope 3, with the widest opening downward, shove in the slides 26, so as to cause them to project beyond the inner wall of this cope, and fill the latter with sand, as-

shown in Fig. 4 of the drawings. When in this position, the parts are jarred by the machine in the manner afore described, so as to cause the sand to firmly settle within the cope and receive the impression from the dies 12 14 of the main or base plate. WVhen the sand has been firmly packed and the impression thus made, this cope 3 is lifted off the main or base plate, is inverted, and set to one side while the remainder of the mold is being formed. The inverting of the cope 3 brings the smaller mouth of the same downward, causing the inclined inner walls to hold the sand within the same. The drag 4 is then placed on top of the main or base plate 1,

and this drag filled with sand, which is likewise jarred or rammed, so as to cause the same to receive the impression from the dies 12 14 of the main or base plate, the drag being shown in position on the main or base plate in Fig. 6 and in Fig. 7 shown lifted 0d the main or base plate, with the impression formed in the sand mold. Before lifting the drag off the main or base plate the'board 34 is placed on top of same, as shown in Fig. 6, the removed drag, with its portion of the sand mold and board in position thereon, being shown in Fig. 7 of the drawings, this drag when lifted off being inverted and set aside upon its board or supplemental plate 34,.

which retains the sand mold therein. When the drag 4 has been thus removed from the top of the main or base plate 1 and set to one side, the said main or base plate 1 is then lifted off the counter-plate 2, the drag is reinverted, so as tohave the impression downward, and is set upon top of the counter-plate 2, which rests upon a suitable base or bed plate. (Not shown.) When this is done, the counter-plate and drag are inverted, so as to cause the two parts to be supported by the board or supplemental plate 34, mounted upon a suitable base or bed plate. (Not shown.) The position of the drag and counter-plate before being inverted is shown in Fig. 9 of the drawings and after being inverted, so as to be supported by the board or supplemental plate 34, in Fig. 10 of the drawings. The counter-plate 2 is then lifted off of the drag 4, leavingthe drag alone upon the bed-blocks, as shown in Fig. 11 of thedrawlugs.

the sand mold, is then placed in position on top of the drag 4, as shown in Fig. 12 of the drawings, thus bringing the two impressions together and forming the completed sand mold within the drag and cope.

leading to the gate, which pin may be placedtherein at a suitable or desired time in orderv to produce the opening 52 for the molten metal to fiow through this opening to the gate and thence into the molds proper, as shown in Fig. 13 of the drawings.

Having fully described my invention, what- I claim as new, and desire to secure by Letters Patent, is-

1. flask for forming molds for casting grooved pulleys, comprising a main or base plate provided with patterns on its upper and lower faces, a counter-plate adapted to fit within said main or base plate and provided with patterns and openings registering with The cope 3, which, as previouslyde: scribed, has had formed therein one-halfnof,

The remain. ing step requires but to shove outslides 2,6,v

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the patterns in the main or base plate, a cope having slides to hold the sand within the same, and a drag adapted to operate with the said main or base plate, the cope and the counterplate for forming the complete mold, substantially as described.

2. A flask for forming molds for casting p p grooved pulleys, the combination of a main. or base plate provided on both of its faces grooved pulleys, comprising a main or base plate provided with a rim and having patterns on its upper and lower faces, a counter-plate adapted to fit within the said rim and provided with patterns, a cope having inclined inner walls, and a drag having inclined inner walls, the main or base plate, the counter-plate, the drag and the cope operating together to form the completed mold, as and for the purpose set forth.

3. The herein-described flask for the purpose specified, which comprises in its constrnction, a main or base plate provided with patterns on its upper and lower faces, a counter-plate adapted to fit within the main or base plate and provided with registering patterns, and a cope and a drag operating in conjunction with each other and with the base-plate and counter-plate to form the completed mold, substantially as set forth.

4. In a flask for forming molds for casting grooved pulleys, the combination with a main or base plate provided on both of its faces with patterns and on one of its faces with a rim, a drag having inclined inner walls, and a cope having inclined inner walls, of a counter-plate provided with patterns adapted to register with those of the main or base plate within the rim of which it is adapted to fit, said counter-plate operating in conj u-nction with the main or base plate and with the cope and drag to form the completed mold, substantially as shown and described.

5. In a flask for forming molds for casting grooved pulleys, the combination with a main or base plate provided on both of its faces with patterns, a drag having slides to hold the sand within the same, and a cope having inclined inner walls, of a counter-plate provided with patterns and openings which are drag, and the cope forforming the completed mold, substantially as described.

6. In a flask for forming molds for casting with patterns and on its one face with a rim which is provided in two opposite sides with apertures, a counter-plate provided with patterns and openings adapted to register with the patterns of the main or base plate, said counter-plate having lugs secured to its ends, said lugs being provided with apertures adapted to register with the apertures in the rim of the main or base plate and are adapted to receive pintle-pins for retaining the base-plate and counter-plate in engagement with each other, a cope having slides to hold the sand within the same, and a drag having inclined inner walls and adapted to operate with the main or base plate, the counter-plate and the cope for formingthe completed mold, substantially as described.

7. A flask for forming molds for casting grooved pulleys, comprising in combination, a base-plate provided on both faces with patterns, a counter-plate adapted to fit within said base-plate and provided with patterns in the base-plate, means removably engaging theends of said plates for holding the same in engagement with each other while being inverted, a cope having inclined inner walls and slides for holding the sand within the same, and a drag having inclined inner walls and adapted to operate with the base-plate, the counter-plateand the copefor forming the completed mold, substantially as described. In testimony whereof I afiix my signature in the presence of two-witnesses.

DANIEL WOLF. Witnesses:

NELLIE M. WOLF, JAMES V. OLIVER. 

